A trio of senior exchange-traded-fund managers will leave KCG Holdings next week amid staff shifts at the electronic-trading company.

Reginald Browne, Eric Lichtenstein and Darren Taube will depart KCG on September 13, a person familiar with the matter said. The firm "made the decision to end the employment of the managers of its listed derivatives group," according to a Wednesday filing with the Securities and Exchange Commission.